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Colonography: Difference between revisions
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* Screening for [[colorectal cancer]] | * Screening for [[colorectal cancer]] | ||
* Rectal atresia (Wangensteen-Rice x-ray is used) | * Rectal atresia (Wangensteen-Rice x-ray is used) | ||
* Abdominal abcess | * [[Abdominal abcess]] | ||
* [[Inflammatory bowel disease]] | * [[Inflammatory bowel disease (Crohn disease and ulcerative colitis)|Inflammatory bowel disease]] | ||
* [[Colonic polyps]] | * [[Colonic polyps]] | ||
== Patient preparation == | == Patient preparation == | ||
Emptying the bowel before colonography is essential. The patient must fast minimum 6 hours ahead and only consume clear fluids (water and thin drinks) the day before. A strong laxative must be given to empty the bowel completely. | Emptying the bowel before colonography is essential. The patient must fast minimum 6 hours ahead and only consume clear fluids (water and thin drinks) the day before. A strong [[laxative]] must be given to empty the bowel completely. | ||
== Interpretation == | == Interpretation == | ||
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In case of colitis, the bowel wall is thickened and the bowel lumen is irregularly narrowed. | In case of colitis, the bowel wall is thickened and the bowel lumen is irregularly narrowed. | ||
== Defecography == | == Lesser used colonic studies == | ||
=== Colonic transit study === | |||
A colonic transit study can be used to evaluate constipation. It involves the patient swallowing a capsule containing many small radiopaque markers. Serial radiographs are then taken, allowing one to visualise the movement of the markers over time. | |||
=== Defecography === | |||
Defecography is a rarely used procedure used to evaluate for constipation. The rectum is filled with barium paste, and the patient defecates during [[Fluoroscopy|fluoroscopic]] examination. | Defecography is a rarely used procedure used to evaluate for constipation. The rectum is filled with barium paste, and the patient defecates during [[Fluoroscopy|fluoroscopic]] examination. | ||
<noinclude> | <noinclude> | ||
[[Category:Radiology]] | [[Category:Radiology]] | ||
</noinclude> | </noinclude> | ||